@charset "utf-8";
body{
    background: #f5f5f5;
}
.centent{
    width: 1353px;
    height: 1675px;
    margin: 0 auto;
    margin-top: 30px;
//  border: 1px solid red;
    .nav_left{
        width: 250px;
        height: 1730px;
        float: left;
//      border: 1px solid blue;
        .menu summary{
            font-size: 20px;
            margin-top: 10px;
        } 
        .menu summary:hover{
            cursor: pointer;
            background: #dcdcdc;
            transform: scale(1.2);
        }
        #conter #help-left .menu ul li a{
            color: black;
            line-height: 30px;
            font-size: 18px;
        }
        #conter #help-left .menu ul li a:hover{
            color: red;
        }
    }
    
    .centent_right{
        width: 1093px;
        height: 1730px;
        float: left;
//      border: 1px solid yellow;
        .centent_img{
            
            background: red;
        }
        .centent_wz{
            table{
                width: 500px;
                height: 200px;
                span{
                    color: #bababa;
                }
                a{
                    color: black;
                }
            }
        }
        .centent_table{
            .span1{
                display: inline-block;
                height: 40px;
                width: 1090px;
                background: #d8d8d8;
                margin-bottom: 10px;
                .span2{
                    margin-top: 10px;
                    margin-left: 20px;
                    select{
                        width: 80px;
                        height: 20px;
                    }
                }
            }
            table{
                width: 1095px;
                height: 1090px;
                
                p{
                    margin: 0;
                    padding: 0;
                }
                tr td{
                    background: white;
                    transition-duration: 1s;
                    position: relative;
                    overflow: hidden;
                    .aaa{
                        width: 269px;
                        height: 270px;
                        position: relative;
//                      border: 1px solid red;
                        span{
                            color: white;
                            position: absolute;
                            left: 0;
                            top: -274px;
                            width: 269px;
                            height: 270px;
                            opacity: 0.5;
                            background: black;
                            text-align: center;
//                          line-height: 300px;
                            font-size: 25px;
                            transition-duration: 1s;
                            i{
                                display: block;
                                margin-top: 130px;
                            }
                        }
                        
                    }
                    .aaa:hover span{
                        position: absolute;
                        left: 0;
                        top: 0;
                        transition-duration: 1s;
                        transition-delay: 1s;
                    }
                    
                    .aaa:before{
                    content: "";
                    width: 270px;
                    height: 270px;
                    background: white;
                    transform: skewX(25deg);
                    opacity: 0.3;
                    position: absolute;
                    left: 355px;
                    transition: 1s;
                    transition-delay: 1s;
                    }
                    .aaa:hover:before{
                        position: absolute;
                        left: -355px;
                        top: 0;
                        transition: 1s;
                        
                    }
                }
            }
            
        }
    }
    .centent_right:after{
        content: "";
        clear: both;
    }

}